554640161 has 2 divisors, whose sum is σ = 554640162. Its totient is φ = 554640160.

The previous prime is 554640139. The next prime is 554640197. The reversal of 554640161 is 161046455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 465696400 + 88943761 = 21580^2 + 9431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-554640161 is a prime.

It is not a weakly prime, because it can be changed into another prime (554640131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277320080 + 277320081.

It is an arithmetic number, because the mean of its divisors is an integer number (277320081).

Almost surely, 2^554640161 is an apocalyptic number.

It is an amenable number.

554640161 is a deficient number, since it is larger than the sum of its proper divisors (1).

554640161 is an equidigital number, since it uses as much as digits as its factorization.

554640161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 554640161 is about 23550.7995830290. The cubic root of 554640161 is about 821.6189318084.

The spelling of 554640161 in words is "five hundred fifty-four million, six hundred forty thousand, one hundred sixty-one".